CN220478784U - Gas phase reaction system utilizing waste heat - Google Patents
Gas phase reaction system utilizing waste heat Download PDFInfo
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- CN220478784U CN220478784U CN202321941164.5U CN202321941164U CN220478784U CN 220478784 U CN220478784 U CN 220478784U CN 202321941164 U CN202321941164 U CN 202321941164U CN 220478784 U CN220478784 U CN 220478784U
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- 238000010574 gas phase reaction Methods 0.000 title claims abstract description 30
- 239000002918 waste heat Substances 0.000 title claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 77
- 238000010438 heat treatment Methods 0.000 claims abstract description 62
- 239000006200 vaporizer Substances 0.000 claims abstract description 23
- 239000000498 cooling water Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 46
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000009834 vaporization Methods 0.000 claims description 16
- 230000008016 vaporization Effects 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 2
- 239000000376 reactant Substances 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 37
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000007795 chemical reaction product Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005576 amination reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The utility model relates to the technical field of gas phase reaction equipment, and discloses a gas phase reaction system utilizing waste heat. The gas phase reaction system comprises a reactor and a raw material vaporizer, wherein a raw material preheater is arranged between the reactor and the raw material vaporizer. The gas phase reaction system of the utility model utilizes the waste heat of the reaction product to carry out primary heating on the raw materials, and the raw materials enter the reactor after passing through the vaporizer, so that the usage amount of the raw material vaporizer steam can be reduced. The product is cooled by the preheater, so that the consumption of circulating cooling water during condensation can be reduced, a heat recycling system is formed, and the energy saving purpose is achieved. And the exhaust emission of the condenser is greatly reduced, the exhaust treatment capacity is reduced, and the purpose of reducing the emission is achieved.
Description
Technical Field
The utility model relates to the technical field of gas phase reaction equipment, in particular to a gas phase reaction system utilizing waste heat.
Background
The gas phase reaction is a method for preparing organic compounds by utilizing gas (steam), can prepare various organic compounds such as organic intermediates, pigments and the like, has high reaction efficiency, and is an important organic synthesis method. However, the gas phase reaction requires that the liquid raw material is vaporized by steam heating to participate in the reaction, for example, in the preparation of ethylene carbonate, ethylene oxide is completely vaporized and then sent into a reactor to react with carbon dioxide, for example, amination reaction and the like. The heating and vaporization of the raw materials needs to consume a large amount of steam, and the energy consumption is large. Meanwhile, the gas phase reaction is required to be carried out under high-temperature heating, the product materials after the reaction have higher temperature, and if the waste heat contained in the product materials is not reasonably utilized, the waste heat can cause great energy waste.
Chinese patent application CN202210047858.8 discloses a reaction kettle reaction waste heat recycling system, including the cauldron body and cauldron cover, still includes rabbling mechanism, cooling body and waste heat recovery device, and waste heat recovery device sets up at the inner wall of cauldron cover and stores through the temperature difference that produces between cooling body and the cauldron body with waste heat conversion into the electric energy. However, the waste heat recovery device used in the system has a complex structure, and the amount of waste heat finally converted into electric energy in actual production is uncertain, so that the effect of actual application may not be ideal.
Disclosure of Invention
Aiming at the problem that the reactor product materials have higher temperature and need to be reasonably recycled in the gas phase reaction, the utility model aims to provide a gas phase reaction system utilizing waste heat, which is used for digesting the waste heat of the reactor product materials, heating raw materials, reducing the temperature of the discharged product materials and reducing the steam consumption required by heating the raw materials.
The utility model provides the following technical scheme:
the gas phase reaction system utilizing waste heat comprises a reactor (1), wherein the upper part of the reactor is provided with a reaction material inlet (1.1), and the lower part of the reactor is provided with a product outlet (1.2), and the gas phase reaction system also comprises a raw material vaporizer (2) and a raw material preheater (3);
the raw material vaporizer is provided with a vaporization inlet (2.1) and a vaporization outlet (2.2), and the vaporization outlet is connected with a reaction material inlet through a vapor transmission pipe (2.5); the raw material preheater is provided with a raw material inlet (3.1) and a raw material outlet (3.2), and the raw material outlet is connected with the vaporization inlet through a raw material conveying pipe (3.4); the raw material preheater is also provided with a heating material inlet (3.5) and a heating material outlet (3.6), and the heating material inlet is connected with a product outlet through a product conveying pipe (1.3).
In the gas phase reaction system, a raw material preheater is arranged between a raw material vaporizer and a reactor, after raw materials enter the raw material preheater, product materials from the reactor are heated, heated and then sent into a steam vaporizer to be heated and vaporized by steam, and then sent into the reactor to react. On the one hand, the raw material is heated by the product materials, so that the temperature of the raw material is increased, and the use amount of steam of the raw material vaporizer can be reduced. In practical production, for example, the temperature of the material at the outlet of the reactor in amination reaction is about 160-200 ℃, the raw material can be heated to 90 ℃ from normal temperature after heat exchange, and the consumption of saturated steam can be obviously reduced. On the other hand, after the product materials are subjected to heat exchange and temperature reduction through the raw material preheater, the consumption of circulating cooling water required by further condensation is greatly reduced, and meanwhile, the exhaust emission of the product condenser is reduced, the exhaust treatment capacity is reduced, and the purpose of reducing emission is achieved.
Preferably, the raw material inlet and the raw material outlet are respectively arranged at the top and the bottom of the raw material preheater, and the heating material inlet and the heating material outlet are respectively arranged at the upper part and the lower part of the side wall of the raw material preheater. In the raw material preheater, raw materials flow from top to bottom, product materials flow from top to bottom, and the raw materials and the product materials form parallel flow, so that the heat transfer efficiency is improved. The raw material preheater used may be implemented using a conventional heat exchanger, such as a tube array heat exchanger.
As the preferable mode of the utility model, the raw material vaporizer is also provided with a steam inlet (2.3) and a condensed water outlet (2.4), and the steam inlet and the condensed water outlet are respectively connected with a steam input pipe (2.6) and a condensed water drain pipe (2.7).
As the preference of the utility model, a steam reheater (4) is also connected to the steam delivery pipe, a heating inlet (4.1) and a heating outlet (4.2) are arranged on the side wall of the steam reheater, the heating inlet is connected with the product delivery pipe through a heating inlet pipe (4.3), the heating outlet is connected with the product delivery pipe through a heating outlet pipe (4.4), and the connection point of the heating outlet pipe and the product delivery pipe is positioned at the downstream of the connection point of the heating inlet pipe and the product delivery pipe. In the process of conveying the raw materials by a steam conveying pipe after the raw materials are vaporized by a steam vaporizer, a small amount of vaporized raw materials are likely to be condensed again, and the reaction efficiency is affected. The saturated steam pressure used in the actual production is 0.6-1 MPa, the temperature is 160-180 ℃, and the temperature is equivalent to the product material temperature of the reactor, so that partial product material is split and used for reheating the vaporized raw material, a small amount of generated condensed raw material is vaporized again, the reaction efficiency is improved, and the waste heat utilization quality is also improved.
As the preferable mode of the utility model, the steam reheater is connected to the position of the steam delivery pipe close to the reaction material inlet. This allows the feed to be introduced into the reactor in the vaporized state as much as possible.
Preferably, the heating inlet pipe is provided with a flow control valve (4.5). The product material flow of the steam reheater can be accurately controlled, and the distribution of the product material is regulated and controlled according to the heating effect.
Preferably, the heating outlet pipe is provided with a one-way valve (4.6). The product material is prevented from flowing into the steam reheater through the heating outlet pipe.
As the optimization of the utility model, the gas phase reaction system also comprises a cooling water heat exchanger (5), wherein the cooling water heat exchanger is provided with a feed inlet (5.1) and a discharge outlet (5.2), and the heating material outlet is connected with the feed inlet of the cooling water heat exchanger through an output pipe (3.7).
The beneficial effects of the utility model are as follows:
the gas phase reaction system of the utility model is provided with the raw material preheater between the reactor and the raw material vaporizer, the waste heat of the reaction product is utilized to carry out primary heating on the raw material, and the raw material enters the reactor after passing through the vaporizer, so that the usage amount of the steam of the raw material vaporizer can be reduced. The product is cooled by the preheater, so that the consumption of circulating cooling water during condensation can be reduced, a heat recycling system is formed, and the energy saving purpose is achieved. And the exhaust emission of the condenser is greatly reduced, the exhaust treatment capacity is reduced, and the purpose of reducing the emission is achieved.
Drawings
FIG. 1 is a view of one embodiment of the gas phase reaction system of the present utility model.
FIG. 2 is a view of another embodiment of the gas phase reaction system of the present utility model.
In the figure, 1, a reactor, 1.1, a reaction material inlet, 1.2, a product outlet, 1.3, a product conveying pipe, 2, a raw material vaporizer, 2.1, a vaporization inlet, 2.2, a vaporization outlet, 2.3, a steam inlet, 2.4, a condensed water outlet, 2.5, a steam conveying pipe, 2.6, a steam input pipe, 2.7, a condensed water drain pipe, 3, a raw material preheater, 3.1, a raw material inlet, 3.2, a raw material outlet, 3.3, a raw material input pipe, 3.4, a raw material conveying pipe, 3.5, a heating material inlet, 3.6, a heating material outlet, 3.7, an output pipe, 4, a steam reheater, 4.1, a heating inlet, 4.2, a heating outlet, 4.3, a heating inlet pipe, 4.4, a heating outlet pipe, 4.5, a flow control valve, 4.6, a one-way valve, 5, a cooling water heat exchanger, 5.1, a material inlet, 5.2 and a material outlet.
Detailed Description
The following description of the embodiments of the utility model is further provided with reference to the accompanying drawings.
Example 1
As shown in fig. 1, a gas phase reaction system utilizing waste heat comprises a reactor 1 and a raw material vaporizer 2, wherein the raw material vaporizer is arranged at the upstream of the reactor, and a raw material preheater 3 is arranged between the raw material vaporizer and the reactor, and the raw material preheater can be a conventional heat exchanger, such as a tube type heat exchanger;
the upper part of the reactor is provided with a reaction material inlet 1.1, and the lower part is provided with a product outlet 1.2; the raw material vaporizer is provided with a vaporization inlet 2.1 and a vaporization outlet 2.2 at the bottom; the top and the bottom of the raw material preheater are respectively provided with a raw material inlet 3.1 and a raw material outlet 3.2, and the upper part and the lower part of the side wall are respectively provided with a heating material inlet 3.5 and a heating material outlet 3.6;
the raw material inlet is connected with a raw material input pipe 3.3, and the raw material outlet is connected with the vaporization inlet through a raw material conveying pipe 3.4; the vaporization outlet is connected with the reaction material inlet through a vapor transmission pipe 2.5; the product outlet is connected with a heating material inlet through a product conveying pipe 1.3, and the heating material outlet is connected with an output pipe 3.7. The steam vaporizer is also provided with a steam inlet 2.3 and a condensed water outlet 2.4; the vaporization outlet is respectively connected with a steam input pipe 2.6 and a condensed water drain pipe 2.7 through a steam transmission pipe 2.5 and a connected steam inlet and a condensed water outlet.
In order to further reduce the temperature of the product materials, a cooling water heat exchanger (5) is further arranged at the downstream of the raw material preheater, a feed inlet 5.1 and a discharge outlet 5.2 are arranged on the cooling water heat exchanger, a heating material outlet is connected with the feed inlet through an output pipe, the product materials enter the cooling water heat exchanger from the feed inlet, and are discharged from the discharge outlet after being cooled by circulating cooling water, so that the product is obtained.
Example 2
As shown in fig. 2, a gas phase reaction system using waste heat is different from that of example 1 in that: and a steam reheater 4 is also connected to the steam delivery pipe, and the steam reheater is connected to the steam delivery pipe at a position close to the reaction material inlet. The steam reheater is provided with a heating inlet 4.1 and a heating outlet 4.2 on the side wall, the heating inlet is connected with a product conveying pipe through a heating inlet pipe 4.3, a flow control valve 4.5 is arranged on the heating inlet pipe, the heating outlet is connected with the product conveying pipe through a heating outlet pipe 4.4, a one-way valve 4.6 is arranged on the heating outlet pipe, and the connection point of the heating outlet pipe and the product conveying pipe is positioned at the downstream of the connection point of the heating inlet pipe and the product conveying pipe.
Claims (8)
1. A gas phase reaction system utilizing waste heat, which comprises a reactor (1), wherein the upper part of the reactor is provided with a reaction material inlet (1.1), the lower part is provided with a product outlet (1.2), and is characterized in that,
the device also comprises a raw material vaporizer (2) and a raw material preheater (3);
the raw material vaporizer is provided with a vaporization inlet (2.1) and a vaporization outlet (2.2), and the vaporization outlet is connected with a reaction material inlet through a vapor transmission pipe (2.5); the raw material preheater is provided with a raw material inlet (3.1) and a raw material outlet (3.2), and the raw material outlet is connected with the vaporization inlet through a raw material conveying pipe (3.4); the raw material preheater is also provided with a heating material inlet (3.5) and a heating material outlet (3.6), and the product outlet is connected with the heating material inlet through a product conveying pipe (1.3).
2. The gas phase reaction system of claim 1 wherein the feed inlet and feed outlet are provided at the top and bottom of the feed preheater, respectively, and the heating feed inlet and heating feed outlet are provided at the upper and lower portions of the side wall of the feed preheater, respectively.
3. The gas phase reaction system according to claim 1 or 2, wherein the raw material vaporizer is further provided with a steam inlet (2.3) and a condensed water outlet (2.4) which are respectively connected with the steam input pipe (2.6) and the condensed water drain pipe (2.7).
4. The gas phase reaction system according to claim 1, wherein a steam reheater (4) is further connected to the steam delivery pipe, a heating inlet (4.1) and a heating outlet (4.2) are arranged on the side wall of the steam reheater, the heating inlet is connected with the product delivery pipe through a heating inlet pipe (4.3), the heating outlet is connected with the product delivery pipe through a heating outlet pipe (4.4), and a connection point of the heating outlet pipe and the product delivery pipe is positioned at the downstream of the connection point of the heating inlet pipe and the product delivery pipe.
5. The gas phase reaction system of claim 4, wherein the steam reheater is connected to the gas pipe at a position near the reactant inlet.
6. A gas phase reaction system according to claim 4 or 5, characterized in that a flow control valve (4.5) is provided on the heating inlet pipe.
7. A gas phase reaction system according to claim 4 or 5, characterized in that the heating outlet pipe is provided with a non-return valve (4.6).
8. The gas phase reaction system according to claim 1, further comprising a cooling water heat exchanger (5), wherein the cooling water heat exchanger is provided with a feed inlet (5.1) and a discharge outlet (5.2), and the heating material outlet is connected with the feed inlet of the cooling water heat exchanger through an output pipe (3.7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321941164.5U CN220478784U (en) | 2023-07-21 | 2023-07-21 | Gas phase reaction system utilizing waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321941164.5U CN220478784U (en) | 2023-07-21 | 2023-07-21 | Gas phase reaction system utilizing waste heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220478784U true CN220478784U (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321941164.5U Active CN220478784U (en) | 2023-07-21 | 2023-07-21 | Gas phase reaction system utilizing waste heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220478784U (en) |
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2023
- 2023-07-21 CN CN202321941164.5U patent/CN220478784U/en active Active
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